/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraWorldManager.h
typedef [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FNiagaraSystemSimulation](API\Plugins\Niagara\FNiagaraSystemSimulation), ESPMode::ThreadSafe > FNiagaraSystemSimulationRef